Property Tax Oklahoma: County Rates, Mills, and 2027 Exemptions

The typical Oklahoma homeowner pays $1,599 a year in property tax on a house worth $199,800, or 0.80 percent of value, based on Census Bureau survey data. By county the share runs from 0.37 percent in McCurtain County to 1.00 percent in Cleveland County. This Oklahoma property tax calculator multiplies your home’s value by the county’s ratio of median tax paid to median home value, splits the result into the two installments, and shows how you compare with the middle owner nearby. Type the fair cash value (market value) from your assessor’s notice or a realistic sale price, not the smaller assessed value.

County Assessment Percentages Between 11 and 13.5

Oklahoma does not tax a home at its full worth. The county assessor sets a fair cash value as of January 1, then assesses real property at a percentage the county chooses inside a band the State Board of Equalization holds between 11 and 13.5 percent. According to the Oklahoma Tax Commission’s 2024 statistics book, 33 counties use 11 percent, including Oklahoma and Tulsa counties, while 25 use 12 percent, among them Cleveland and Canadian. The three Panhandle counties of Beaver, Cimarron and Texas sit at 13 percent, and Alfalfa, Garfield and Grant use 12.5.

That percentage matters less than it looks: a county at 13 percent with low mills can bill less than one at 11 percent with high mills. The calculator’s explanation line shows both figures for your county beside the Census ratio.

The 3 Percent Cap, and Why a Buyer Pays More

Article X, Section 8B of the Oklahoma Constitution limits how fast taxable fair cash value can climb: 3 percent a year for a homestead or agricultural land and 5 percent for other real property. A homestead carried at $200,000 can go no higher than $206,000 the next year, even if nearby sales jump 10 percent. The limit falls away in any year the title changes hands, so a sale resets the value to full fair cash value, and improvements are added at full value too.

Here is the practical result. A buyer paying $250,000 in Oklahoma County starts at $27,500 assessed (11 percent), subtracts the $1,000 homestead exemption, and multiplies $26,500 by the county’s 2024 average of 119.51 mills: about $3,166.91. The calculator’s Census ratio of 0.97 percent gives $2,425.00 for the same house, $741.91 less, because it averages in neighbors whose capped values trail the market. New owners should budget toward the formula figure.

Mills, Excise Boards, and the Tax Commission’s County Averages

Oklahoma levies are stated in mills; each mill is a dollar for every $1,000 of assessed value. The assessor values property but does not set any levy. Levies come from the constitution or from votes of local taxpayers, and budgets pass through the county excise board, where the county clerk serves as secretary. One home’s total stacks school district, county, city, technology center and local bond levies, so Canadian County alone carries about 50 combined rates.

The Tax Commission publishes one average per county. For 2024 the highest were Tulsa at 127.48 mills, Oklahoma County at 119.51 and Cleveland at 119.20. The lowest were Cimarron at 66.17, Grant at 67.26 and Roger Mills at 69.64.

County Ratios From McCurtain to Cleveland

The Census ratios in the calculator divide each county’s median real estate tax paid by its median owner-occupied value, from the American Community Survey 2024 five-year release. Exemptions, the cap and senior freezes are already baked in.

• Highest: Cleveland 1.00 percent; Canadian, Oklahoma and Tulsa 0.97; Washington 0.90. No other county reaches 0.90.
• Lowest: McCurtain 0.37 percent, Pushmataha 0.39, Cimarron 0.40, Choctaw 0.41, Murray 0.42 and Haskell 0.43.
• Middle county: 0.63 percent, with 33 of the 77 counties under 0.60.
• Largest typical bill: Canadian, $2,394 on $246,200. Smallest: Cimarron, $395 on $98,600.

The statewide 0.80 percent sits above the middle county because the four metro counties hold a large share of owners and carry the steepest ratios. At $200,000, the gap between the ends of the list is plain: Cleveland comes to $2,000.00 a year and McCurtain to $740.00.

Two worked examples that match the calculator. A $250,000 home in Oklahoma County at 0.97 percent comes to $2,425.00 a year, or two halves of $1,212.50 and $202.08 a month; that is $270 above the county’s $2,155 median payment. A $300,000 house in Tulsa County at 0.97 percent comes to $2,910.00, halves of $1,455.00 and $242.50 a month, $683 more than Tulsa’s $2,227 median.

Homestead, Additional Homestead, the Senior Freeze, and Veterans

The homestead exemption removes $1,000 of assessed value, not $1,000 of tax; several estimator sites get this wrong. At the Tax Commission averages it saves about $119.51 a year in Oklahoma County, $127.48 in Tulsa County and $66.17 in Cimarron County; Cleveland’s assessor puts the range there at $75 to $125. Eligibility requires owning and occupying the home as of January 1; in 2024, 641,668 Oklahoma homesteads carried it.

• Additional homestead exemption: another $1,000 of assessed value when the household’s gross income from all sources for the prior year was $30,000 or less, a limit recently raised from $20,000. File between January 1 and March 15; owners 65 and older who have qualified do not refile.
• Senior valuation limitation: a head of household 65 or older by January 1, with gross household income no higher than the HUD median for the county, can freeze the home’s fair cash value. File OTC Form 994 with the assessor from January 1 to March 15 or within 30 days of a valuation notice.
• 100 percent disabled veterans: an honorably discharged veteran rated by the VA as 100 percent permanently disabled, or the surviving spouse, pays no ad valorem tax on the homestead. In 2024 this covered about $6.9 billion of fair cash value statewide.
• Property tax relief refund: owners 65 or older or totally disabled, with household income of $12,000 or less, can claim back tax paid above 1 percent of income, up to $200, from the Tax Commission by June 30.

Thirty Days to Protest, Then the Board of Equalization

When the assessor raises your value, the notice shows the fair cash value, taxable value, assessed value and assessment percentage for both years, and it carries a mailing date. Under 68 O.S. 2876 you have 30 calendar days from that date to file a written protest on the Tax Commission form. If the value did not change, a protest is still allowed through the first Monday in April.

The assessor holds an informal hearing, in person or by phone, and must mail a written decision within seven days. If you disagree, you have 15 calendar days from that mailing to appeal to the county board of equalization, and beyond the board lie the district court and the Court of Tax Review.

December 31, March 31, and the June Resale

The treasurer mails statements at the end of November, and taxes are due from November 1. Pay at least half before January 1 and the rest before April 1; miss the first half and the full year’s tax becomes delinquent on January 1. Mortgage servicers must pay escrowed accounts in one payment before January 1, and a bill of $25 or less is due in full by then.

Delinquent tax accrues interest of 1.5 percent a month until paid, stopping only when the interest equals the tax itself. The unpaid amount is a lien on the land. Once taxes have gone unpaid for three years, the treasurer advertises the property for the county resale held on the second Monday of June, where the home can be sold.

SQ 847 on the November 2026 Ballot and the Next Data Refresh

The biggest pending change is State Question 847, sent to voters by Senate Joint Resolution 39 in April 2026 and set for the November 3, 2026 ballot. If approved, the yearly cap drops to 1.75 percent for homesteads and farmland and to 4 percent for other real property starting with tax year 2027. On a $200,000 capped value, the most it could then rise in a year is to $203,500 instead of $206,000.

SQ 847 would also rework the senior freeze: owners 65 and older at or below the HUD median income would keep a full freeze, while higher incomes would face limits of 0.35 to 1.75 percent in steps, with no income ceiling to qualify. The Census ratios here predate all of it. Revisit your estimate after the vote, when the Tax Commission posts new millage, and when the next Census five-year survey lands.

Sources: county ratios built from Census Bureau tables B25103 (taxes paid) and B25077 (home value), American Community Survey 2024 five-year release; assessment percentages, county average mills and exemption counts from the Oklahoma Tax Commission 2024 Ad Valorem Statistics Book; Oklahoma Constitution Article X; Title 68 of the Oklahoma Statutes; OTC Form 994; Secretary of State filing for SQ 847. Take valuation questions to your county assessor and payment questions to your county treasurer.